SexyIrishLeprechaun

Chosen answer: The time that Evan goes back and saves the dog, she gets hit in a different way and her cheek is split open - hence the scar. In the "original" timeline, she got hit in the head, not the cheek.

Paul Plesser

Answer: They are not making an educated guess at all. In the original timeline, her brother struck her in the side of the head, she still bled and was injured but no visible scar. In the altered "blackout" timeline when he goes back and tries to save everything/fix it, somehow it shows Kayleigh getting hit in a different spot. When her brother swung, it smacked her in the side of the face instead of the head, splitting her cheek wide open, leaving a visible injury/scar later on. It was most definitely, 100% shown to the audience, when her brother struck her differently. Lol.

Answer: First of all you need to remember that this sequence started right after Evan makes that big scene by using some sharp object on those two criminal brothers in prison to get his journals back from them. Now later when Evan is able to save the dog, he wakes up in his bed and starts bleeding as a repercussion from storing all those years of memory of this new reality at once, but the flashes that are shown when he wakes up are actually the flashes about how the reality changed after he saved the dog and Kayleigh's brother dies instead. In one of those scene it is shown that the grown up mentally disturbed Kayleigh asks for a lift and those same two criminal brothers are shown in the car she gets inside. So we can assume that the line of business she is shown in later and those scars she has is actually due to her getting along with the wrong people.

rupal

Chosen answer: The picture depicts the scene in the prison where Even stabbed the inmate.